How it works

One creative thread from raw idea to test-ready package.

Thumbuild keeps the video promise, visual direction, edits, title pairings, and testing rationale connected across every iteration.

Bring the raw material

Describe the video idea, enter a working title, paste a script excerpt, and optionally attach user-owned reference images in the workspace.

Included in the workspace

Turn the source into a compact brief: audience, payoff, curiosity gap, emotional tone, must-show elements, and constraints.

Included in the workspace

Generate two meaningfully different routes: one GPT Image 2 pass and one Nano Banana Pro pass.

Included in the workspace

Refine text, subjects, backgrounds, shapes, and effects directly or with a recognised plain-language edit.

Included in the workspace

Review mobile readability, hierarchy, subject prominence, relevance, originality, and policy safety with visible reasoning.

Included in the workspace

Pair two model-specific thumbnail hypotheses with complementary titles and package the files, notes, and rationale for publishing.

Included in the workspace